I have reopened an old project and now for some reason it does not compile any more.
There is a special class which has a strange icon: class file with a black cross. (see the screen shot attached).
The compiler only says: cannot find symbol class TagEvent. The file itself can be compiled without problems. A rebuild and cache cleaning did not help.
Has anyone seen this kind of file symbol and knwos what it means. I renamed the file, checked all permissions and so on.
Other projects compile fine. It is Idea 8.1 #9732, JDK 1.6.0_12.
Thanks for any suggestions